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Description

France AFNOR X8Ni9 Fasteners with stainless steel and nickel alloy for high temperature and low temperature (NF-EN 10269(1999)) and X8Ni9 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: X8Ni9
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel X8Ni9 AFNOR France Fasteners with stainless steel and nickel alloy for high temperature and low temperature (NF-EN 10269(1999))
NiCr15Fe7TiAI
X2CrNb18-9
X3CrNiMoBN17-13-3
X5CrNi18-10
X5CrNiMo17-12-2
X6CrNi18-10
X6CrNiMoB17-12-2
X6CrNiTiB18-10
X6NiCrTiMoB25-15-2
X7CrNiMoBNb16-6

Chemical composition(mass fraction)(wt.%) of the X8Ni9

C(%) Si(%) Mn(%) P(%) S(%) Ni(%) Mo(%) V(%)
Max 0.10 Max 0.35 0.30-0.80 Max 0.020 Max 0.010 8.50-10.0 Max 0.10 Max 0.05

Mechanical Properties of steel grade X8Ni9

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
677 (≥) 658 (≥) 24 11 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical Properties of steel grade X8Ni9

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
11 - -     0.24 -  
131 317 - 22.3 232   -  
942 - 44 42.2   444 222

Heat Treatment of steel grade X8Ni9

Heat treated : 1763°C - 1833°C

Technological Curves of steel grade X8Ni9

Cross Reference Table (Equivalent Grade) of X8Ni9

Grade Standard Country Application
X8Ni9 AFNOR France Fasteners with stainless steel and nickel alloy for high temperature and low temperature (NF-EN 10269(1999))
X8Ni9 UNE Spain Spain structural alloy steel
X8Ni9 UNE Spain Spain structural alloy steel
X8Ni9KK ONORM Austria Austrian structural steel
EN X8Ni9 EN Euronorm Euronorm Structural steel

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